geekwright /
XoopsCore25
| Conditions | 84 |
| Paths | 4544 |
| Total Lines | 608 |
| Code Lines | 369 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
| 1 | <?php |
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| 82 | public function getid3_bmp(&$BMPdata, &$ThisFileInfo, $ExtractPalette=false, $ExtractData=false) { |
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| 83 | |||
| 84 | // shortcuts |
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| 85 | $ThisFileInfo['bmp']['header']['raw'] = array(); |
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| 86 | $thisfile_bmp = &$ThisFileInfo['bmp']; |
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| 87 | $thisfile_bmp_header = &$thisfile_bmp['header']; |
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| 88 | $thisfile_bmp_header_raw = &$thisfile_bmp_header['raw']; |
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| 89 | |||
| 90 | // BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp |
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| 91 | // all versions |
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| 92 | // WORD bfType; |
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| 93 | // DWORD bfSize; |
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| 94 | // WORD bfReserved1; |
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| 95 | // WORD bfReserved2; |
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| 96 | // DWORD bfOffBits; |
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| 97 | |||
| 98 | $offset = 0; |
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| 99 | $overalloffset = 0; |
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| 100 | $BMPheader = substr($BMPdata, $overalloffset, 14 + 40); |
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| 101 | $overalloffset += (14 + 40); |
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| 102 | |||
| 103 | $thisfile_bmp_header_raw['identifier'] = substr($BMPheader, $offset, 2); |
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| 104 | $offset += 2; |
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| 105 | |||
| 106 | if ($thisfile_bmp_header_raw['identifier'] != 'BM') { |
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| 107 | $ThisFileInfo['error'][] = 'Expecting "BM" at offset '. (int) (@$ThisFileInfo[ 'avdataoffset']) .', found "'. $thisfile_bmp_header_raw[ 'identifier'].'"'; |
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| 108 | unset($ThisFileInfo['fileformat']); |
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| 109 | unset($ThisFileInfo['bmp']); |
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| 110 | return false; |
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| 111 | } |
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| 112 | |||
| 113 | $thisfile_bmp_header_raw['filesize'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 114 | $offset += 4; |
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| 115 | $thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 116 | $offset += 2; |
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| 117 | $thisfile_bmp_header_raw['reserved2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 118 | $offset += 2; |
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| 119 | $thisfile_bmp_header_raw['data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 120 | $offset += 4; |
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| 121 | $thisfile_bmp_header_raw['header_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 122 | $offset += 4; |
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| 123 | |||
| 124 | |||
| 125 | // check if the hardcoded-to-1 "planes" is at offset 22 or 26 |
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| 126 | $planes22 = $this->LittleEndian2Int(substr($BMPheader, 22, 2)); |
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| 127 | $planes26 = $this->LittleEndian2Int(substr($BMPheader, 26, 2)); |
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| 128 | if (($planes22 == 1) && ($planes26 != 1)) { |
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| 129 | $thisfile_bmp['type_os'] = 'OS/2'; |
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| 130 | $thisfile_bmp['type_version'] = 1; |
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| 131 | } elseif (($planes26 == 1) && ($planes22 != 1)) { |
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| 132 | $thisfile_bmp['type_os'] = 'Windows'; |
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| 133 | $thisfile_bmp['type_version'] = 1; |
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| 134 | } elseif ($thisfile_bmp_header_raw['header_size'] == 12) { |
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| 135 | $thisfile_bmp['type_os'] = 'OS/2'; |
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| 136 | $thisfile_bmp['type_version'] = 1; |
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| 137 | } elseif ($thisfile_bmp_header_raw['header_size'] == 40) { |
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| 138 | $thisfile_bmp['type_os'] = 'Windows'; |
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| 139 | $thisfile_bmp['type_version'] = 1; |
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| 140 | } elseif ($thisfile_bmp_header_raw['header_size'] == 84) { |
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| 141 | $thisfile_bmp['type_os'] = 'Windows'; |
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| 142 | $thisfile_bmp['type_version'] = 4; |
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| 143 | } elseif ($thisfile_bmp_header_raw['header_size'] == 100) { |
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| 144 | $thisfile_bmp['type_os'] = 'Windows'; |
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| 145 | $thisfile_bmp['type_version'] = 5; |
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| 146 | } else { |
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| 147 | $ThisFileInfo['error'][] = 'Unknown BMP subtype (or not a BMP file)'; |
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| 148 | unset($ThisFileInfo['fileformat']); |
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| 149 | unset($ThisFileInfo['bmp']); |
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| 150 | return false; |
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| 151 | } |
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| 152 | |||
| 153 | $ThisFileInfo['fileformat'] = 'bmp'; |
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| 154 | $ThisFileInfo['video']['dataformat'] = 'bmp'; |
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| 155 | $ThisFileInfo['video']['lossless'] = true; |
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| 156 | $ThisFileInfo['video']['pixel_aspect_ratio'] = (float) 1; |
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| 157 | |||
| 158 | if ($thisfile_bmp['type_os'] == 'OS/2') { |
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| 159 | |||
| 160 | // OS/2-format BMP |
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| 161 | // http://netghost.narod.ru/gff/graphics/summary/os2bmp.htm |
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| 162 | |||
| 163 | // DWORD Size; /* Size of this structure in bytes */ |
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| 164 | // DWORD Width; /* Bitmap width in pixels */ |
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| 165 | // DWORD Height; /* Bitmap height in pixel */ |
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| 166 | // WORD NumPlanes; /* Number of bit planes (color depth) */ |
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| 167 | // WORD BitsPerPixel; /* Number of bits per pixel per plane */ |
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| 168 | |||
| 169 | $thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 170 | $offset += 2; |
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| 171 | $thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 172 | $offset += 2; |
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| 173 | $thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 174 | $offset += 2; |
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| 175 | $thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 176 | $offset += 2; |
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| 177 | |||
| 178 | $ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width']; |
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| 179 | $ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height']; |
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| 180 | $ThisFileInfo['video']['codec'] = 'BI_RGB '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit'; |
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| 181 | $ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel']; |
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| 182 | |||
| 183 | if ($thisfile_bmp['type_version'] >= 2) { |
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| 184 | // DWORD Compression; /* Bitmap compression scheme */ |
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| 185 | // DWORD ImageDataSize; /* Size of bitmap data in bytes */ |
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| 186 | // DWORD XResolution; /* X resolution of display device */ |
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| 187 | // DWORD YResolution; /* Y resolution of display device */ |
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| 188 | // DWORD ColorsUsed; /* Number of color table indices used */ |
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| 189 | // DWORD ColorsImportant; /* Number of important color indices */ |
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| 190 | // WORD Units; /* Type of units used to measure resolution */ |
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| 191 | // WORD Reserved; /* Pad structure to 4-byte boundary */ |
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| 192 | // WORD Recording; /* Recording algorithm */ |
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| 193 | // WORD Rendering; /* Halftoning algorithm used */ |
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| 194 | // DWORD Size1; /* Reserved for halftoning algorithm use */ |
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| 195 | // DWORD Size2; /* Reserved for halftoning algorithm use */ |
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| 196 | // DWORD ColorEncoding; /* Color model used in bitmap */ |
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| 197 | // DWORD Identifier; /* Reserved for application use */ |
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| 198 | |||
| 199 | $thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 200 | $offset += 4; |
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| 201 | $thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 202 | $offset += 4; |
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| 203 | $thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 204 | $offset += 4; |
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| 205 | $thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 206 | $offset += 4; |
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| 207 | $thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 208 | $offset += 4; |
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| 209 | $thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 210 | $offset += 4; |
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| 211 | $thisfile_bmp_header_raw['resolution_units'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 212 | $offset += 2; |
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| 213 | $thisfile_bmp_header_raw['reserved1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 214 | $offset += 2; |
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| 215 | $thisfile_bmp_header_raw['recording'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 216 | $offset += 2; |
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| 217 | $thisfile_bmp_header_raw['rendering'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 218 | $offset += 2; |
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| 219 | $thisfile_bmp_header_raw['size1'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 220 | $offset += 4; |
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| 221 | $thisfile_bmp_header_raw['size2'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 222 | $offset += 4; |
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| 223 | $thisfile_bmp_header_raw['color_encoding'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 224 | $offset += 4; |
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| 225 | $thisfile_bmp_header_raw['identifier'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 226 | $offset += 4; |
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| 227 | |||
| 228 | $thisfile_bmp_header['compression'] = $this->BMPcompressionOS2Lookup($thisfile_bmp_header_raw['compression']); |
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| 229 | |||
| 230 | $ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit'; |
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| 231 | } |
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| 232 | |||
| 233 | } elseif ($thisfile_bmp['type_os'] == 'Windows') { |
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| 234 | |||
| 235 | // Windows-format BMP |
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| 236 | |||
| 237 | // BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp |
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| 238 | // all versions |
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| 239 | // DWORD biSize; |
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| 240 | // LONG biWidth; |
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| 241 | // LONG biHeight; |
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| 242 | // WORD biPlanes; |
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| 243 | // WORD biBitCount; |
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| 244 | // DWORD biCompression; |
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| 245 | // DWORD biSizeImage; |
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| 246 | // LONG biXPelsPerMeter; |
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| 247 | // LONG biYPelsPerMeter; |
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| 248 | // DWORD biClrUsed; |
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| 249 | // DWORD biClrImportant; |
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| 250 | |||
| 251 | $thisfile_bmp_header_raw['width'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 252 | $offset += 4; |
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| 253 | $thisfile_bmp_header_raw['height'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 254 | $offset += 4; |
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| 255 | $thisfile_bmp_header_raw['planes'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 256 | $offset += 2; |
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| 257 | $thisfile_bmp_header_raw['bits_per_pixel'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 2)); |
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| 258 | $offset += 2; |
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| 259 | $thisfile_bmp_header_raw['compression'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 260 | $offset += 4; |
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| 261 | $thisfile_bmp_header_raw['bmp_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 262 | $offset += 4; |
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| 263 | $thisfile_bmp_header_raw['resolution_h'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 264 | $offset += 4; |
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| 265 | $thisfile_bmp_header_raw['resolution_v'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 266 | $offset += 4; |
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| 267 | $thisfile_bmp_header_raw['colors_used'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 268 | $offset += 4; |
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| 269 | $thisfile_bmp_header_raw['colors_important'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 270 | $offset += 4; |
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| 271 | |||
| 272 | $thisfile_bmp_header['compression'] = $this->BMPcompressionWindowsLookup($thisfile_bmp_header_raw['compression']); |
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| 273 | $ThisFileInfo['video']['resolution_x'] = $thisfile_bmp_header_raw['width']; |
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| 274 | $ThisFileInfo['video']['resolution_y'] = $thisfile_bmp_header_raw['height']; |
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| 275 | $ThisFileInfo['video']['codec'] = $thisfile_bmp_header['compression'].' '.$thisfile_bmp_header_raw['bits_per_pixel'].'-bit'; |
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| 276 | $ThisFileInfo['video']['bits_per_sample'] = $thisfile_bmp_header_raw['bits_per_pixel']; |
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| 277 | |||
| 278 | if (($thisfile_bmp['type_version'] >= 4) || ($thisfile_bmp_header_raw['compression'] == 3)) { |
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| 279 | // should only be v4+, but BMPs with type_version==1 and BI_BITFIELDS compression have been seen |
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| 280 | $BMPheader .= substr($BMPdata, $overalloffset, 44); |
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| 281 | $overalloffset += 44; |
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| 282 | |||
| 283 | // BITMAPV4HEADER - [44 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_2k1e.asp |
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| 284 | // Win95+, WinNT4.0+ |
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| 285 | // DWORD bV4RedMask; |
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| 286 | // DWORD bV4GreenMask; |
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| 287 | // DWORD bV4BlueMask; |
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| 288 | // DWORD bV4AlphaMask; |
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| 289 | // DWORD bV4CSType; |
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| 290 | // CIEXYZTRIPLE bV4Endpoints; |
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| 291 | // DWORD bV4GammaRed; |
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| 292 | // DWORD bV4GammaGreen; |
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| 293 | // DWORD bV4GammaBlue; |
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| 294 | $thisfile_bmp_header_raw['red_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 295 | $offset += 4; |
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| 296 | $thisfile_bmp_header_raw['green_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 297 | $offset += 4; |
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| 298 | $thisfile_bmp_header_raw['blue_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 299 | $offset += 4; |
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| 300 | $thisfile_bmp_header_raw['alpha_mask'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 301 | $offset += 4; |
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| 302 | $thisfile_bmp_header_raw['cs_type'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 303 | $offset += 4; |
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| 304 | $thisfile_bmp_header_raw['ciexyz_red'] = substr($BMPheader, $offset, 4); |
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| 305 | $offset += 4; |
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| 306 | $thisfile_bmp_header_raw['ciexyz_green'] = substr($BMPheader, $offset, 4); |
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| 307 | $offset += 4; |
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| 308 | $thisfile_bmp_header_raw['ciexyz_blue'] = substr($BMPheader, $offset, 4); |
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| 309 | $offset += 4; |
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| 310 | $thisfile_bmp_header_raw['gamma_red'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 311 | $offset += 4; |
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| 312 | $thisfile_bmp_header_raw['gamma_green'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 313 | $offset += 4; |
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| 314 | $thisfile_bmp_header_raw['gamma_blue'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 315 | $offset += 4; |
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| 316 | |||
| 317 | $thisfile_bmp_header['ciexyz_red'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_red'])); |
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| 318 | $thisfile_bmp_header['ciexyz_green'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_green'])); |
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| 319 | $thisfile_bmp_header['ciexyz_blue'] = $this->FixedPoint2_30(strrev($thisfile_bmp_header_raw['ciexyz_blue'])); |
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| 320 | } |
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| 321 | |||
| 322 | if ($thisfile_bmp['type_version'] >= 5) { |
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| 323 | $BMPheader .= substr($BMPdata, $overalloffset, 16); |
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| 324 | $overalloffset += 16; |
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| 325 | |||
| 326 | // BITMAPV5HEADER - [16 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_7c36.asp |
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| 327 | // Win98+, Win2000+ |
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| 328 | // DWORD bV5Intent; |
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| 329 | // DWORD bV5ProfileData; |
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| 330 | // DWORD bV5ProfileSize; |
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| 331 | // DWORD bV5Reserved; |
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| 332 | $thisfile_bmp_header_raw['intent'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 333 | $offset += 4; |
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| 334 | $thisfile_bmp_header_raw['profile_data_offset'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 335 | $offset += 4; |
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| 336 | $thisfile_bmp_header_raw['profile_data_size'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 337 | $offset += 4; |
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| 338 | $thisfile_bmp_header_raw['reserved3'] = $this->LittleEndian2Int(substr($BMPheader, $offset, 4)); |
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| 339 | $offset += 4; |
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| 340 | } |
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| 341 | |||
| 342 | } else { |
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| 343 | |||
| 344 | $ThisFileInfo['error'][] = 'Unknown BMP format in header.'; |
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| 345 | return false; |
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| 346 | |||
| 347 | } |
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| 348 | |||
| 349 | if ($ExtractPalette || $ExtractData) { |
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| 350 | $PaletteEntries = 0; |
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| 351 | if ($thisfile_bmp_header_raw['bits_per_pixel'] < 16) { |
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| 352 | $PaletteEntries = pow(2, $thisfile_bmp_header_raw['bits_per_pixel']); |
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| 353 | } elseif (isset($thisfile_bmp_header_raw['colors_used']) && ($thisfile_bmp_header_raw['colors_used'] > 0) && ($thisfile_bmp_header_raw['colors_used'] <= 256)) { |
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| 354 | $PaletteEntries = $thisfile_bmp_header_raw['colors_used']; |
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| 355 | } |
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| 356 | if ($PaletteEntries > 0) { |
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| 357 | $BMPpalette = substr($BMPdata, $overalloffset, 4 * $PaletteEntries); |
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| 358 | $overalloffset += 4 * $PaletteEntries; |
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| 359 | |||
| 360 | $paletteoffset = 0; |
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| 361 | for ($i = 0; $i < $PaletteEntries; $i++) { |
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| 362 | // RGBQUAD - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_5f8y.asp |
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| 363 | // BYTE rgbBlue; |
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| 364 | // BYTE rgbGreen; |
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| 365 | // BYTE rgbRed; |
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| 366 | // BYTE rgbReserved; |
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| 367 | $blue = $this->LittleEndian2Int($BMPpalette[ $paletteoffset++ ]); |
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| 368 | $green = $this->LittleEndian2Int($BMPpalette[ $paletteoffset++ ]); |
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| 369 | $red = $this->LittleEndian2Int($BMPpalette[ $paletteoffset++ ]); |
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| 370 | if (($thisfile_bmp['type_os'] == 'OS/2') && ($thisfile_bmp['type_version'] == 1)) { |
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| 371 | // no padding byte |
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| 372 | } else { |
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| 373 | $paletteoffset++; // padding byte |
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| 374 | } |
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| 375 | $thisfile_bmp['palette'][$i] = (($red << 16) | ($green << 8) | ($blue)); |
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| 376 | } |
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| 377 | } |
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| 378 | } |
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| 379 | |||
| 380 | if ($ExtractData) { |
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| 381 | $RowByteLength = ceil(($thisfile_bmp_header_raw['width'] * ($thisfile_bmp_header_raw['bits_per_pixel'] / 8)) / 4) * 4; // round up to nearest DWORD boundary |
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| 382 | |||
| 383 | $BMPpixelData = substr($BMPdata, $thisfile_bmp_header_raw['data_offset'], $thisfile_bmp_header_raw['height'] * $RowByteLength); |
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|
Bug
introduced
by
|
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| 384 | $overalloffset = $thisfile_bmp_header_raw['data_offset'] + ($thisfile_bmp_header_raw['height'] * $RowByteLength); |
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| 385 | |||
| 386 | $pixeldataoffset = 0; |
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| 387 | switch (@$thisfile_bmp_header_raw['compression']) { |
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| 388 | |||
| 389 | case 0: // BI_RGB |
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| 390 | switch ($thisfile_bmp_header_raw['bits_per_pixel']) { |
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| 391 | case 1: |
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| 392 | for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) { |
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| 393 | for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) { |
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| 394 | $paletteindexbyte = ord($BMPpixelData{$pixeldataoffset++}); |
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| 395 | for ($i = 7; $i >= 0; $i--) { |
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| 396 | $paletteindex = ($paletteindexbyte & (0x01 << $i)) >> $i; |
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| 397 | $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex]; |
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| 398 | $col++; |
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| 399 | } |
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| 400 | } |
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| 401 | while (($pixeldataoffset % 4) != 0) { |
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| 402 | // lines are padded to nearest DWORD |
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| 403 | $pixeldataoffset++; |
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| 404 | } |
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| 405 | } |
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| 406 | break; |
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| 407 | |||
| 408 | case 4: |
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| 409 | for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) { |
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| 410 | for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col = $col) { |
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| 411 | $paletteindexbyte = ord($BMPpixelData{$pixeldataoffset++}); |
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| 412 | for ($i = 1; $i >= 0; $i--) { |
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| 413 | $paletteindex = ($paletteindexbyte & (0x0F << (4 * $i))) >> (4 * $i); |
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| 414 | $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex]; |
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| 415 | $col++; |
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| 416 | } |
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| 417 | } |
||
| 418 | while (($pixeldataoffset % 4) != 0) { |
||
| 419 | // lines are padded to nearest DWORD |
||
| 420 | $pixeldataoffset++; |
||
| 421 | } |
||
| 422 | } |
||
| 423 | break; |
||
| 424 | |||
| 425 | case 8: |
||
| 426 | for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) { |
||
| 427 | for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) { |
||
| 428 | $paletteindex = ord($BMPpixelData{$pixeldataoffset++}); |
||
| 429 | $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex]; |
||
| 430 | } |
||
| 431 | while (($pixeldataoffset % 4) != 0) { |
||
| 432 | // lines are padded to nearest DWORD |
||
| 433 | $pixeldataoffset++; |
||
| 434 | } |
||
| 435 | } |
||
| 436 | break; |
||
| 437 | |||
| 438 | case 24: |
||
| 439 | for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) { |
||
| 440 | for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) { |
||
| 441 | $thisfile_bmp['data'][$row][$col] = (ord($BMPpixelData{$pixeldataoffset+2}) << 16) | (ord($BMPpixelData{$pixeldataoffset+1}) << 8) | ord($BMPpixelData{$pixeldataoffset}); |
||
| 442 | $pixeldataoffset += 3; |
||
| 443 | } |
||
| 444 | while (($pixeldataoffset % 4) != 0) { |
||
| 445 | // lines are padded to nearest DWORD |
||
| 446 | $pixeldataoffset++; |
||
| 447 | } |
||
| 448 | } |
||
| 449 | break; |
||
| 450 | |||
| 451 | case 32: |
||
| 452 | for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) { |
||
| 453 | for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) { |
||
| 454 | $thisfile_bmp['data'][$row][$col] = (ord($BMPpixelData{$pixeldataoffset+3}) << 24) | (ord($BMPpixelData{$pixeldataoffset+2}) << 16) | (ord($BMPpixelData{$pixeldataoffset+1}) << 8) | ord($BMPpixelData{$pixeldataoffset}); |
||
| 455 | $pixeldataoffset += 4; |
||
| 456 | } |
||
| 457 | while (($pixeldataoffset % 4) != 0) { |
||
| 458 | // lines are padded to nearest DWORD |
||
| 459 | $pixeldataoffset++; |
||
| 460 | } |
||
| 461 | } |
||
| 462 | break; |
||
| 463 | |||
| 464 | case 16: |
||
| 465 | // ? |
||
| 466 | break; |
||
| 467 | |||
| 468 | default: |
||
| 469 | $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data'; |
||
| 470 | break; |
||
| 471 | } |
||
| 472 | break; |
||
| 473 | |||
| 474 | |||
| 475 | case 1: // BI_RLE8 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp |
||
| 476 | switch ($thisfile_bmp_header_raw['bits_per_pixel']) { |
||
| 477 | case 8: |
||
| 478 | $pixelcounter = 0; |
||
| 479 | while ($pixeldataoffset < strlen($BMPpixelData)) { |
||
| 480 | $firstbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 481 | $secondbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 482 | if ($firstbyte == 0) { |
||
| 483 | |||
| 484 | // escaped/absolute mode - the first byte of the pair can be set to zero to |
||
| 485 | // indicate an escape character that denotes the end of a line, the end of |
||
| 486 | // a bitmap, or a delta, depending on the value of the second byte. |
||
| 487 | switch ($secondbyte) { |
||
| 488 | case 0: |
||
| 489 | // end of line |
||
| 490 | // no need for special processing, just ignore |
||
| 491 | break; |
||
| 492 | |||
| 493 | case 1: |
||
| 494 | // end of bitmap |
||
| 495 | $pixeldataoffset = strlen($BMPpixelData); // force to exit loop just in case |
||
| 496 | break; |
||
| 497 | |||
| 498 | case 2: |
||
| 499 | // delta - The 2 bytes following the escape contain unsigned values |
||
| 500 | // indicating the horizontal and vertical offsets of the next pixel |
||
| 501 | // from the current position. |
||
| 502 | $colincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 503 | $rowincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 504 | $col = ($pixelcounter % $thisfile_bmp_header_raw['width']) + $colincrement; |
||
| 505 | $row = ($thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width'])) - $rowincrement; |
||
| 506 | $pixelcounter = ($row * $thisfile_bmp_header_raw['width']) + $col; |
||
| 507 | break; |
||
| 508 | |||
| 509 | default: |
||
| 510 | // In absolute mode, the first byte is zero and the second byte is a |
||
| 511 | // value in the range 03H through FFH. The second byte represents the |
||
| 512 | // number of bytes that follow, each of which contains the color index |
||
| 513 | // of a single pixel. Each run must be aligned on a word boundary. |
||
| 514 | for ($i = 0; $i < $secondbyte; $i++) { |
||
| 515 | $paletteindex = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 516 | $col = $pixelcounter % $thisfile_bmp_header_raw['width']; |
||
| 517 | $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']); |
||
| 518 | $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex]; |
||
| 519 | $pixelcounter++; |
||
| 520 | } |
||
| 521 | while (($pixeldataoffset % 2) != 0) { |
||
| 522 | // Each run must be aligned on a word boundary. |
||
| 523 | $pixeldataoffset++; |
||
| 524 | } |
||
| 525 | break; |
||
| 526 | } |
||
| 527 | |||
| 528 | } else { |
||
| 529 | |||
| 530 | // encoded mode - the first byte specifies the number of consecutive pixels |
||
| 531 | // to be drawn using the color index contained in the second byte. |
||
| 532 | for ($i = 0; $i < $firstbyte; $i++) { |
||
| 533 | $col = $pixelcounter % $thisfile_bmp_header_raw['width']; |
||
| 534 | $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']); |
||
| 535 | $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$secondbyte]; |
||
| 536 | $pixelcounter++; |
||
| 537 | } |
||
| 538 | |||
| 539 | } |
||
| 540 | } |
||
| 541 | break; |
||
| 542 | |||
| 543 | default: |
||
| 544 | $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data'; |
||
| 545 | break; |
||
| 546 | } |
||
| 547 | break; |
||
| 548 | |||
| 549 | |||
| 550 | |||
| 551 | case 2: // BI_RLE4 - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_6x0u.asp |
||
| 552 | switch ($thisfile_bmp_header_raw['bits_per_pixel']) { |
||
| 553 | case 4: |
||
| 554 | $pixelcounter = 0; |
||
| 555 | while ($pixeldataoffset < strlen($BMPpixelData)) { |
||
| 556 | $firstbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 557 | $secondbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 558 | if ($firstbyte == 0) { |
||
| 559 | |||
| 560 | // escaped/absolute mode - the first byte of the pair can be set to zero to |
||
| 561 | // indicate an escape character that denotes the end of a line, the end of |
||
| 562 | // a bitmap, or a delta, depending on the value of the second byte. |
||
| 563 | switch ($secondbyte) { |
||
| 564 | case 0: |
||
| 565 | // end of line |
||
| 566 | // no need for special processing, just ignore |
||
| 567 | break; |
||
| 568 | |||
| 569 | case 1: |
||
| 570 | // end of bitmap |
||
| 571 | $pixeldataoffset = strlen($BMPpixelData); // force to exit loop just in case |
||
| 572 | break; |
||
| 573 | |||
| 574 | case 2: |
||
| 575 | // delta - The 2 bytes following the escape contain unsigned values |
||
| 576 | // indicating the horizontal and vertical offsets of the next pixel |
||
| 577 | // from the current position. |
||
| 578 | $colincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 579 | $rowincrement = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 580 | $col = ($pixelcounter % $thisfile_bmp_header_raw['width']) + $colincrement; |
||
| 581 | $row = ($thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width'])) - $rowincrement; |
||
| 582 | $pixelcounter = ($row * $thisfile_bmp_header_raw['width']) + $col; |
||
| 583 | break; |
||
| 584 | |||
| 585 | default: |
||
| 586 | // In absolute mode, the first byte is zero. The second byte contains the number |
||
| 587 | // of color indexes that follow. Subsequent bytes contain color indexes in their |
||
| 588 | // high- and low-order 4 bits, one color index for each pixel. In absolute mode, |
||
| 589 | // each run must be aligned on a word boundary. |
||
| 590 | $paletteindexes = array(); |
||
| 591 | for ($i = 0, $iMax = ceil($secondbyte / 2); $i < $iMax; $i++) { |
||
| 592 | $paletteindexbyte = $this->LittleEndian2Int($BMPpixelData[ $pixeldataoffset++ ]); |
||
| 593 | $paletteindexes[] = ($paletteindexbyte & 0xF0) >> 4; |
||
| 594 | $paletteindexes[] = ($paletteindexbyte & 0x0F); |
||
| 595 | } |
||
| 596 | while (($pixeldataoffset % 2) != 0) { |
||
| 597 | // Each run must be aligned on a word boundary. |
||
| 598 | $pixeldataoffset++; |
||
| 599 | } |
||
| 600 | |||
| 601 | foreach ($paletteindexes as $dummy => $paletteindex) { |
||
| 602 | $col = $pixelcounter % $thisfile_bmp_header_raw['width']; |
||
| 603 | $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']); |
||
| 604 | $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindex]; |
||
| 605 | $pixelcounter++; |
||
| 606 | } |
||
| 607 | break; |
||
| 608 | } |
||
| 609 | |||
| 610 | } else { |
||
| 611 | |||
| 612 | // encoded mode - the first byte of the pair contains the number of pixels to be |
||
| 613 | // drawn using the color indexes in the second byte. The second byte contains two |
||
| 614 | // color indexes, one in its high-order 4 bits and one in its low-order 4 bits. |
||
| 615 | // The first of the pixels is drawn using the color specified by the high-order |
||
| 616 | // 4 bits, the second is drawn using the color in the low-order 4 bits, the third |
||
| 617 | // is drawn using the color in the high-order 4 bits, and so on, until all the |
||
| 618 | // pixels specified by the first byte have been drawn. |
||
| 619 | $paletteindexes[0] = ($secondbyte & 0xF0) >> 4; |
||
| 620 | $paletteindexes[1] = ($secondbyte & 0x0F); |
||
| 621 | for ($i = 0; $i < $firstbyte; $i++) { |
||
| 622 | $col = $pixelcounter % $thisfile_bmp_header_raw['width']; |
||
| 623 | $row = $thisfile_bmp_header_raw['height'] - 1 - (($pixelcounter - $col) / $thisfile_bmp_header_raw['width']); |
||
| 624 | $thisfile_bmp['data'][$row][$col] = $thisfile_bmp['palette'][$paletteindexes[($i % 2)]]; |
||
| 625 | $pixelcounter++; |
||
| 626 | } |
||
| 627 | |||
| 628 | } |
||
| 629 | } |
||
| 630 | break; |
||
| 631 | |||
| 632 | default: |
||
| 633 | $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data'; |
||
| 634 | break; |
||
| 635 | } |
||
| 636 | break; |
||
| 637 | |||
| 638 | |||
| 639 | case 3: // BI_BITFIELDS |
||
| 640 | switch ($thisfile_bmp_header_raw['bits_per_pixel']) { |
||
| 641 | case 16: |
||
| 642 | case 32: |
||
| 643 | $redshift = 0; |
||
| 644 | $greenshift = 0; |
||
| 645 | $blueshift = 0; |
||
| 646 | if (!$thisfile_bmp_header_raw['red_mask'] || !$thisfile_bmp_header_raw['green_mask'] || !$thisfile_bmp_header_raw['blue_mask']) { |
||
| 647 | $ThisFileInfo['error'][] = 'missing $thisfile_bmp_header_raw[(red|green|blue)_mask]'; |
||
| 648 | return false; |
||
| 649 | } |
||
| 650 | while ((($thisfile_bmp_header_raw['red_mask'] >> $redshift) & 0x01) == 0) { |
||
| 651 | $redshift++; |
||
| 652 | } |
||
| 653 | while ((($thisfile_bmp_header_raw['green_mask'] >> $greenshift) & 0x01) == 0) { |
||
| 654 | $greenshift++; |
||
| 655 | } |
||
| 656 | while ((($thisfile_bmp_header_raw['blue_mask'] >> $blueshift) & 0x01) == 0) { |
||
| 657 | $blueshift++; |
||
| 658 | } |
||
| 659 | for ($row = ($thisfile_bmp_header_raw['height'] - 1); $row >= 0; $row--) { |
||
| 660 | for ($col = 0; $col < $thisfile_bmp_header_raw['width']; $col++) { |
||
| 661 | $pixelvalue = $this->LittleEndian2Int(substr($BMPpixelData, $pixeldataoffset, $thisfile_bmp_header_raw['bits_per_pixel'] / 8)); |
||
| 662 | $pixeldataoffset += $thisfile_bmp_header_raw['bits_per_pixel'] / 8; |
||
| 663 | |||
| 664 | $red = (int) round(((($pixelvalue & $thisfile_bmp_header_raw[ 'red_mask']) >> $redshift) / ($thisfile_bmp_header_raw[ 'red_mask'] >> $redshift)) * 255); |
||
| 665 | $green = (int) round(((($pixelvalue & $thisfile_bmp_header_raw[ 'green_mask']) >> $greenshift) / ($thisfile_bmp_header_raw[ 'green_mask'] >> $greenshift)) * 255); |
||
| 666 | $blue = (int) round(((($pixelvalue & $thisfile_bmp_header_raw[ 'blue_mask']) >> $blueshift) / ($thisfile_bmp_header_raw[ 'blue_mask'] >> $blueshift)) * 255); |
||
| 667 | $thisfile_bmp['data'][$row][$col] = (($red << 16) | ($green << 8) | ($blue)); |
||
| 668 | } |
||
| 669 | while (($pixeldataoffset % 4) != 0) { |
||
| 670 | // lines are padded to nearest DWORD |
||
| 671 | $pixeldataoffset++; |
||
| 672 | } |
||
| 673 | } |
||
| 674 | break; |
||
| 675 | |||
| 676 | default: |
||
| 677 | $ThisFileInfo['error'][] = 'Unknown bits-per-pixel value ('.$thisfile_bmp_header_raw['bits_per_pixel'].') - cannot read pixel data'; |
||
| 678 | break; |
||
| 679 | } |
||
| 680 | break; |
||
| 681 | |||
| 682 | |||
| 683 | default: // unhandled compression type |
||
| 684 | $ThisFileInfo['error'][] = 'Unknown/unhandled compression type value ('.$thisfile_bmp_header_raw['compression'].') - cannot decompress pixel data'; |
||
| 685 | break; |
||
| 686 | } |
||
| 687 | } |
||
| 688 | |||
| 689 | return true; |
||
| 690 | } |
||
| 871 |
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